Endress+Hauser Oxymax COS22D, Руководство по эксплуатации

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Maintenance Oxymax COS22D
26
Hauser
7.3 Cleaning the sensor
The measurement can be corrupted by sensor fouling or malfunction, e.g.:
• --> cause longer response times and a reduced slope under certain circumstances.
To ensure reliable measurement, the sensor must be cleaned at regular intervals. The frequency and
intensity of the cleaning operation depend on the measuring medium.
Clean the sensor:
• before every calibration
• at regular intervals during operation as necessary
• before returning it for repairs.
Depending on the type of soiling, proceed as follows:
After cleaning, rinse the sensor with copious amounts of clean water.
7.4 Wear parts and consumables
Parts of the sensor will suffer wear and tear during operation.
Suitable action can restore normal operating functionality. This action includes:
Type of soiling Cleaning
Salt deposits Immerse the sensor in drinking water or in 1-5% hydrochloric acid
for a few minutes. Afterwards, rinse it with copious amounts of water.
Dirt particles on the sensor body and the
sensor cap
(not membrane!)
Clean the sensor body and cap mechanically with water and a suitable
brush.
Dirt particles on the membrane body or the
membrane Clean with water and a soft sponge.
Action Cause
Replacing the sealing ring visual damage to a sealing ring
Replacing the electrolyte unstable or implausible measuring signal or electrolyte soiling
Replacing the membrane body uncleanable membrane, damaged membrane (hole or overstretch)